200 BRITISH ICHNEUMONS. \Pezomachus. 



19. tener, Forst. 



Pezomachus agilis, var. 5e, Grav. I. E. ii. S99. P. leiier, Forst. Wicgm. Arch. 1850, 

 p. 1 20, 9 . 



Antennae almost as long as the whole body ; first joint of flagellum 

 about as long as second ; fifth slightly longer than wide. Metathorax 

 very short, appearing scarcely half as long as the mesothorax ; the petiolar 

 area very large, broad and almost quadrate, its basal costa entirely 

 wanting. Abdomen somewhat closely punctured and pubescent ; first 

 segment not tuberculate ; terebra shorter than first segment. 



Head, thorax and abdomen uniform coffee-brown ; antennae brown, 

 with the apex of pedicellus and extreme base of first joint of flagellum 

 yellow. Legs brownish ; trochanters, extreme apex of femora, extreme 

 base of tibiae and all the tarsal joints rufo-testaceous. The sheaths of the 

 terebra are yellowish. Length, ij mm. 



The formation of the thorax and the colour of the legs are said to be 

 sufficient to distinguish this species. Not uncommon about Norwich 

 (Bridgman) ; Exminster, early in July (Bignell) ; Maldon in Essex (Fitch) ; 

 Battle, in Sussex (Vict. Hist.) ; Dorsetshire (Entom. 1881, p. 137). 



20. micrurus, Forst. 



Pezomachus viicrtirus, Forst. Wiegm. Arch. 1850, p. 187, ? ; Thorns. O. E. x. 

 1007, (5 ? , 



9 . Cheeks short, with their sulci deeply impressed ; vertex deeply 

 emarginate ; clypeus apically truncate ; mandibles apically narrow and 

 basally not tuberculate. Antennae with basal flagellar joint imperceptibly 

 longer than the second and the fifth very slightly longer than broad. 

 Metathorax shorter than the meso, with the petiolar area oblique, its basal 

 costa forming a high, broad arch ; apophyses small and acute ; acetabula 

 occupying the whole mesosternum. Abdomen densely and finely punctate 

 and pubescent ; basal segment with no projecting tubercles, petiole curved 

 and broad, post-petiole very broad and strongly transverse ; second and 

 third segments with spiracles far from the lateral margins ; terebra less 

 than half the length of the basal segment. Legs stout, the hind ones 

 curved and elongate. 



Head black ; antennae dark piceous, with the scape and base of flagellum 

 red. Pro- and meso-thorax fulvous, with the sides of the latter and whole 

 metathorax black, the colour being sharply defined. Abdomen black, 

 with the two basal segments entirely, and the apical margins of the 

 remainder, red. Legs testaceous or red, with the apical tarsal joint 

 piceous. 



$ . Apterous. Petiolar area distinct ; abdoinen fusiform with the 

 petiole stout, curved and the tubercles in the apical third. Legs stout. 

 Black, with the legs and base of antennae flavous. Length, 3-4 mm. 



A specimen of this species was swept in the neighbourhood of Exeter, 

 in the middle of July, 1866, by Parfitt ; and another, from Dorsetshire, by 

 Pickard-Cambridge (Trans. Ent. Soc. 1881, p. 156 et Entom. 1881, p. 137). 

 Bred in South Devon from the egg-bag of a spider, Ocyale (Fisaura) 

 mirabilis, on the i6th and iSth July, 1S83 and 1893 (Bignell). Battle in 



